In Section 4 we extend the model to capture a corporate spin-o¤ and .nd that, because each new .rm.s shareholder base will generally not be the same as that of the original single .rm, total market capitalization can increase or decrease around a spin-o¤. Consequently, a spin-off can provide the .rm with an opportunity to tailor its shareholder base in a way that increases the total share price. In particular, separating one .rm into two allows for improved risk sharing between investors, which increases share price. However, as a result
of the change in shareholder base, the pricing of the expected CSR outcome changes as well. This causes the spin-off to reduce total stock price when the expected CSR outcome is very high, but also allows the split to be even more value-enhancing when the expected CSR outcome is negative. We therefore predict that managers motivated to increase stock prices are more likely to spin o¤ business segments that have negative expected CSR performance (e.g., the so-called .sin stocks.) but keep segments with positive expected CSR performance.